Shontal compared some of the properties of a marble to a piece
of wood. She placed a marble and a piece of wood in a bucket filled
with water. Shontal observed the wood floating on top of the water,
but the marble sank to the bottom of the bucket. Which statement
best explains why the marble and piece of wood acted differently in
the water?
Answers
Answer:
The piece of wood was less dense than the water.
Explanation:
When an object has a lower density than water, it will float on the water.
Related Questions
6. The Haber process for making ammonia (NH)
gas from its elements was developed by Fritz Haber
during WWI. Haber hoped to use ammonia as
fertilizer to grow food for Germany during the
Allie's blockade. How many liters of hydrogen
would be required to produce 40.0L of ammonia at
STP? N+H, NH,
Answers
Answer:
60 Liters
Explanation:
The equation for this reaction is given as;
N2 + 3H2 → 2NH3
From the reaction;
3 mol of H2 produces 2 mol of NH3
At STP;
1 mol = 22.4 L
This means
67.2 L ( 3 * 22.4) of H2 produces 44.8 L ( 2 * 22.4) of NH3
How many L of H2 would produce 40 L of NH3
67.2 = 44.8
x = 40
Solving for x;
x = 40 * 67.2 / 44.8
x = 60 L
what phase of matter changes volume when moved from one container to another ?
Answers
Answer:
gas
Explanation:
Gas
Explanation:
The volume of gas varies inversely with the pressure, when temperature is kept constant.
If the amount of gas in a container is increased, the volume increases. If the amount of gas in a container is decreased, the volume decreases.
how many atoms in 10.0 g of Ar?
Answers
Answer:
1.51 x 10^23 atoms of Ar
Explanation:
Start out with what you're given.
10.0 g of Ar/1 * 1 mol/39.948 g Ar * 6.022*10^23 atoms/1 mol
(It's easier if you write it out.)
You always want to start out w/ what you're given and continue your unit conversions from there. Since you started out with grams of Argon, you want grams of Argon on the bottom to cancel it out. Once you found the unit conversion: 1 mol/39.948 g Ar (molar mass of Ar), now it's time to convert to atoms. Since 1 mol is up on top, put 1 mol on the bottom. Considering you're looking for atoms, use Avagradro's number: 6.022*10^23.
Once simplified, you should get 1.51 x 10^23 atoms of Ar.
***I hope this helps! I also suggest using a mole map, if you're interested.***
Which objects have the most eccentric orbits?
Answers
Hope this helps
please help! Will give Brainliest!
Answers
Answer: the answer is c
Explanation:
also, is that canvas? sajdasds
Which stateinent is accurate?
Answers
Describe a time in the group discussion when someone cited evidence from their research to make a point.
Answers
The role of the presenter in a group discussion to introduce information for the group to discuss.
What do you mean by group discussion?A discussion involving a number of people who are connected by some shared activity, interest, or quality.
Group discussion is a tool to test your teamwork skills, listening skills, discussion ability, subject knowledge, and communication.
Intrinsic skills like reasoning, speaking and time management come in very handy.
Skills that you can work upon include presentation, summarizing and people speaking.
The purpose of a group discussion is not to win an argument or to amuse your classmates.
The purpose of a discussion is to help each group member explore and discover personal meanings of a text through interaction with other people.
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Answer:
This happened when a nutritional question was presented. When asked a nutritional question, evidence was cited from one of the above sites to back up the answer.
Explanation:
Which is NOT a way nitrogen can be fixed or made more useful?
a
lightning
b
Nitrogen fixing bacteria
c
denitrification
d
assimilation
Answers
Answer:
A lightning
Explanation:
need help balancing these
Answers
Answer:
The answers are 1:3:13
Explanation:
when I had to do these types of equations just search them up on you-tube lol theres this guy called Wayne Breslyn that does a really good job of explaining and has like the answers for any and everyy balancing equation
Can someone help me with this chem question?
Answers
Answer:
Malleable
Explanation:
C - Good thermal insulator
Explanation:
Metals are ductile, malleable, and are good electrical conductors. They are also good conductors of heat, but that doesn’t mean they make good thermal insulators.
Which of the following equations is balanced?
a) HgO -> Hg + 02
b) 2Mg + C12 --> MgCl2
c) P4 + 402 - 2P205
d) 2AgNO3 + CaCl2 --> 2AgCl + Ca(NO3)2
e) None of the above
Answers
Answer:
a
Explanation:
a because a
Suppose astronomers are interested in obtaining an image of a large
area in the sky. Which radiation should astronomers observe if they
want to get images 24 hours a day, quickly and cheaply? Why?
Answers
Explain what a convection current is and how it causes winds in the atmosphere.
Answers
2NO+2CO N 2 +2CO 2 There are 3.0 g of NO and 3.0 g of CO reacting . What is the limiting reactant ?
Answers
Answer: NO
Explanation:
As per the given balanced equation, 2 moles of NO reacts with 2 moles of CO. Hence, 3 g or 1.07 moles of CO needs to react with the same number of moles of NO. But we have only 3 g or 0.1 mole of NO. Hence, NO is the limiting reactant.
What is limiting reactant ?A limiting reactant in a reaction is the reactant which is fewer in amount or consume early without complete reaction with other reactants. Hence, as soon as this reactant is consume, the reaction stops.
Given 2 moles of NO reacts with 2 moles of CO.
molar mass of NO = 30 g/mol
molar mass of CO = 28 g/mol.
Number of moles in 3 g of CO = 3/28 = 1.07 moles
number of moles in 3 g of NO = 3/30 = 0.1 moles.
1.07 moles of CO needs 1.07 moles of NO. But only 0.1 moles are present.
Therefore, NO is the limiting reactant in this reaction.
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What is the primary difference between a molecule and a compound?
A. All molecules are compounds, but not all compounds are molecules
B. Molecules always contain only one type of atom, unlike compounds
C. Compounds must be composed of more than one type of atom
Answers
Answer:
A. "All molecules are compounds, but not all compounds are molecules"
Explanation:
An example of a compound-molecule is oxygen. The elemenal is O, because the periodic table isn't describing molecules, it's describing atoms. The molecule is O2 because it takes 2 O atoms to make a molecule of oxygen.
The primary difference between a molecule and a compound is 'compounds must be composed of more than one type of atom'.
Explanation:
A molecule is a group of atoms of the same or different types of atoms bound to each other.Molecules are the smallest unit of a substance that possesses the characteristic of the substance.A compound is a substance in which two or more different types of atoms are bound to each other.In compounds, atoms of different elements are in a fixed proportion.So, from this, we can conclude that the primary difference between a molecule and a compound is 'compounds must be composed of more than one type of atom'.
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Which of the following examples best describes an effect of urbanization?
A More land is available in large cities to grow crops.
B Wildlife diversity increases due to more open spaces within the city.
C Emissions from motor vehicles increase smog in the air that can block radiation.
D The greater concentration of people in large cities reduces overall waste production and accumulation on Earth.
please help
Answers
Emissions from motor vehicles increase smog in the air which can block radiation. Hence, option C is correct.
What does it mean to live in an urban area?An urban area is a region surrounding a city. Most inhabitants of urban areas have nonagricultural jobs. Urban areas are very developed, meaning there is a density of human structures such as houses, commercial buildings, roads, bridges, and railways. "Urban area" can refer to towns, cities, and suburbs.
Emission from motor vehicles increases smog in the air that can block radiation, which makes sense because urbanization means more people in one area=lots of pollution.
Hence, option C is correct.
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Find the volume of 2.40 moles of gas whose temperature is 50.0°C and whose pressure is 2.00 atm.
Answers
n=2.4 moles
T=273.15+50=323.15K
P=2*101325=202650 Pa
R=8.31
Solve for V:
V=nRT/P=2.4*8.31*323.15/202650=.032m^3
Which substance is a binary acid?
• hydrochloric acid
O phosphoric acid
• nitrous acid
O sulfuric acid
Answers
Answer:
hydrochloric acid
Explanation:
If today is Monday and it is a 1st Quarter moon, what phase will it
be on Thursday?
Answers
Answer:
Wanning gibouss 56%
Explanation:
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Sexual reproduction influences genetic variation. Which of the following properly describes the influence that sexual reproduction has on genetic variation?
A) Crossing over occurs during meiosis, which results in the exchange of alleles between homologous chromosomes. This exchange of genetic material allows for the production of new combinations of alleles in gametes and an increase in genetic variation.
B) Crossing over occurs during mitosis, which results in the exchange of alleles between homologous chromosomes. This exchange of genetic material allows for the production of new combinations of alleles in gametes and an increase in genetic variation.
C) Crossing over occurs during mitosis, which results in the exchange of alleles between sister chromatid. This exchange of genetic material allows for the production of identical combinations of alleles in gametes and a decrease in genetic variation.
D) Crossing over occurs during meiosis, which results in the exchange of alleles between sister chromatid. This exchange of genetic material allows for the production of identical combinations of alleles in gametes and a decrease in genetic variation.
Answers
Answer:
C
Explanation:
The statement that best describes the influence that sexual reproduction has on genetic variation is as follows:
Crossing over occurs during mitosis, which results in the exchange of alleles between homologous chromosomes. This exchange of genetic material allows for the production of new combinations of alleles in gametes and an increase in genetic variation.Thus, the correct option for this question is B.
What is Crossing over?Crossing over may be defined as a biological mechanism through which genetic material gets exchanged between the non-sister chromatids of the homologous chromosomes. The process of crossing over occurs in the Pachytene stage of mitosis.
Option C is incorrect because the process of crossing over never occurs between sister chromatids. So, it is eliminated. While options A and D are incorrect because they describe the mechanism of crossing over in the sense of meiosis which is absolutely incorrect.
Therefore, the correct option for this question is B.
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What is the unit of measurement for potential electric energy existing between two points on a circuit?
A. Joule
B. Voltage
C. Current
Answers
It is Joules/Coulombs which is the same thing as Voltage.
Write a strong claim about the question:
What shape are cells?
( i don't really need a long answer)
Answers
Answer:
Usually, the cells are round, elongated or spherical. There are also some cells which are long and pointed on both the ends. Such cells exhibit spindle shape. In some cases, the cells are very long.
Explanation:
Hope I helped! Brainliest plz!
Which of the following best explains how minerals get into streams?
A. Rainwater that is high in minerals from the atmosphere falls into the stream.
B. The stream absorbs minerals from the plants growing in and around its banks.
C. Rainwater dissolves minerals out of the rocks and soil along the stream during runoff.
D. When water evaporates from the ocean, it takes minerals with it and redeposits them as rainwater into the stream.
please help me
Answers
Answer:
C:Rainwater dissolves minerals out of the rocks and soil along the stream during runoff
the correct formula for the diagram is
1. 2KO
2. K2O
3. K2O
4. KOK2
Answers
Answer:
The diagram provided shows K2O, or potassium oxide.
Explanation:
Ok... so, there are two "K2O" options, so I would just choose either and hope for the best. I don't know, maybe it's a mistake...
Answer:
The answer is K2O or dipotassium Monoxide
what gives off greenhouse gases
Answers
Answer:
the combustion of fossil fuels, such as coal, oil, and natural gas, to produce electricity.
PLEASE HELP GUYS PLEASE!!!! I will LOVE WHOEVER HELP
ME FOREVER
Answers
Answer:
B. It is highly flammable.
Explanation:
Chemical properties deal with how the substance will behave when brought into contact with other substances, and usually have to do with it undergoing some kind of reaction. Flammability is a chemical property.
Density, melting point, and color are all considered physical properties.
Answer:
d
Explanation:
ignition is a chemical. reaction
Solutions of potassium chloride and silver nitrate are mixed.
Answers
Answer:
A solution of potassium chloride when mixed with silver nitrate solution forms an insoluble white substance silver chloride.
Explanation:
:)
The unique shape of DNA allows what
Answers
Answer: to copy itself during cell division
Explanation:
2.50 L of gas originally at 50 K is warmed to 80 K. If the pressure remains constant, which gas law needs to be used to find the new volume?
Select one:
a.Charles law
b.Gay-Lussac’s law
c.Boyle’s law
d.Combined gas law
Answers
SOMEBODY PLEASE HELP ME
Scenario
On Halloween, children prepared to go trick-or-treating with glow sticks. They prepared two glow sticks (“Glow Stick In” and “Glow Stick Out”) following the directions below. The light intensity was given a value of 10 for both Glow Stick In and Glow Stick Out. At 6:00, the children left Glow Stick In inside of the 25oC house and took Glow Stick Out outside in 10oC weather. At 8:00, they noticed the light intensity of Glow Stick Out at 10oC had decreased to 5. They immediately returned home and noticed the light intensity of Glow Stick In at 25oC had decreased to 7. At 9:00, both glow sticks were at 25oC. Glow Stick In had a light intensity of 6, and Glow Stick Out had a light intensity of 8.
Using at least two scientific principles, write a scientific explanation that includes evidence that justifies or describes the change in light intensity of both glow sticks. Please use claim evidence reasoning.
Answers
Answer:
look out for a bot with a link he will get yo ip
Explanation:
Answer: It will become solid again and the form of it will change, because when you heat up something you add energy to it. The particles move further and further apart.
Explanation: